Final answer:
Visual elements such as logos, graphic organizers, and images should be used in the body of a direct response letter to make it more visually engaging and impactful.
Step-by-step explanation:
The graphic devices that should be used in the body of a direct response letter include logos, graphic organizers, and images. Including these visual elements can help capture the reader's attention, convey information more effectively, and enhance the overall appeal of the letter.
Logos can be used to represent the company or organization sending the letter, making it easily identifiable and memorable. Graphic organizers like tables and figures can help organize and visually present information in a structured and easy-to-understand format. Images can be used to illustrate key points, evoke emotions, or provide evidence to support the message of the letter.
By incorporating these graphic devices, the body of a direct response letter can become more visually engaging and impactful.